I posted back in 2021 about cracks in the rear Cap on our 2019 3100 which we bought from the factory SD used in 2020. The cracks are now worse with one below the window actually showing a small void/,open space. The factory told me the paint folks they used are out of business and that I should pursue a fix on my own. Since we are in Arizona I am trying to find the guy who did previous paint work for us on previous RV or a reputable substitute. Luckily we have a lot of old RV friends where we are to get referrals.
Dave at the factory said they could also fix it (,no discussion of price,) but we will likely not be in that area this year.
Hank